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Spectral phase effects and control requirements of coherent beam combining for ultrashort ultrahigh intensity laser systems

机译：超短超高强度激光系统相干光束合成的光谱相位效应和控制要求

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Based on the premise that further improvements to the size and damage threshold of large-aperture optical components are severely limited, coherent beam combining (CBC) is a promising way to scale up the available peak power of pulses for ultrashort ultrahigh intensity laser systems. Spectral phase effects are important issues and have a significant impact on the performance of CBC. In this work, we analyze systematically factors such as spectral dispersions and longitudinal chromatism, and get the general spectral phase control requirements of CBC for ultrashort ultrahigh intensity laser systems. It is demonstrated that different orders of dispersion influence intensity shape of the combined beam, and high-order dispersions affect the temporal contrast of the combined beam, while the number of the channels to be combined has little impact on the temporal Strehl ratio (SR) of the combined beam. In addition, longitudinal chromatism should be controlled effectively since it has a detrimental effect on the combined beam at the focal plane, both temporally and spatially. (C) 2016 Optical Society of America
机译：基于严格限制大孔径光学组件的尺寸和损伤阈值的前提，相干光束合并（CBC）是扩大超短超高强度激光系统的可用脉冲峰值功率的有前途的方法。频谱相位效应是重要的问题，对CBC的性能有重大影响。在这项工作中，我们系统地分析了诸如光谱色散和纵向色度等因素，并获得了超短超高强度激光系统CBC的一般光谱相位控制要求。结果表明，不同阶的色散会影响合成光束的强度形状，而高阶色散会影响合成光束的时间对比度，而要合并的通道数对时间斯特列尔比（SR）的影响很小组合光束另外，应该有效地控制纵向色差，因为它会对焦平面上的组合光束在时间和空间上产生不利影响。 （C）2016美国眼镜学会

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